Assig



(No Model.) 2 Sheets-Sheet 1. T. 0. PERRY.

DOUBLE ACTING PUMP.

Patented Nov. 6 1883.

INVENTORI WETNESSESZ figeecwdw N. PETERS. Pholo-Ulhnguphtl. wmingnm. D c.

(No Model.) 2 Sheets-Sheet 2.

T. 0. PERRY.

DOUBLE ACTING PUMP.

N0. 288,108. Patented NOV. 6, 1883.

INVENTUH:

WITNESS ES g/MMLQM N. PCTEns. Fhuwulhogmphcr. Washington. D. c.

UNrTEn STATES PATENT @rrrcn.

THOMAS O. PERRY, OF BATAVIA, ILLINOIS, ASSI GNOR TO THE UNITED STATES W'IND ENGINE AND PUMP COMPANY, OF SAME PLACE.

DOUBLE-ACTING PUMP.

SPECIFICATION forming part of Letters Patent No. 288,108, dated-November 6, 1883.

Application filedSeptemhcr 16, 1882.

(No model To all whom it may concern.-

Be it known that I THos. O. PERRY, of Batavia, in the county of Kane and State of Illinois, have invented a new and useful Improvement in DoubleAction Pumps, of which the following is a specification.

The invention relates to that class of doubleaction pumps which have a solid piston working in a single vertical cylinder, and which have all the valves arranged around the top of the cylinder.

In general construction and action this pump is not materially different from some other double-action pumps which have long been in use.

The improvements which I claim as new have for their object, chiefly, facility in construction and convenience in getting at the valves, in case cleaning or repairs become necessary.

In the drawings, Figure 1 is a plan of the top of the pump with the yoke cut oif. Fig. 2 is an elevation of the pump, shown partially in section through K L. Fig. 3 is a sectional elevation through A. B. Fig. 4 is a sectional plan throughA B. Fig. 5 is a plan of the top of the pump, with the yoke, piston, cylinder-cap and its attachments. valve-covers and their clamps, all removed, so as to expose the valves and interior of cylinder. Fig. 6 is vertical section cutting the pump through the connecting-passage and valves communicating therewith. The yoke Y and its attachments are omitted. Fig. '7 is a vertical section cutting the pump through F G, and also showing the yoke. Fig. 8 is a sectional planof that part of the pump below the dotted line H J.

Similar letters refer to similar parts throughout the several views.

Water is taken into the pump through the inlet I and discharged through the outlet J.

Both inlet and outlet are provided with flanges,

for convenience in connecting pipes.

The piston O is solid, and is given a reciprocating motion in the vertical cylinder Q, the upper end of which is covered by the cylindercap 1), secured by studs and nuts, and made water tight by packing, in the usual way.

A stuffing-hon, X, is attached to the cylinder-cap D, through which the piston-rod G passes.

Th ere are four valves, M N O P, symmetrically arranged around the top of the cylinder Q. M and N are inlet-valves. O and P are discharge-valves. M and O communicate with the top of the cylinder Q, as shown in Figs 3 and 7. N and P communicate with the bottom of cylinder Q through the connectingpassage Q andthe base V, whichis bolted to the bottom of the cylinder Q and connecting-passage Q, and is so formed as to establish communication bet-ween them. (See Figs. 4, 6, and 7 The four valve-seats are shown at M N O P.

The valves M N O P are guidedaud kept in place by their stems fitting loosely into sheaths attached to the under side of the corresponding valve-covers, M N O P. The valveeovers M NO]? are directly over the valves M N O P, and cover openings large enough v to allowthevalves being put in place or taken out through the top of the pump. These covers are provided with shallow shoulders on their under sides, which fit into the openings,

covered, so as to prevent lateral displacement.

The valve-covers M and N are held down and made tight by a single clamp, T, whose ends are pressed against the elevated centers of each cover by means of a nut, U, and single stud S, which passes through the center of the clamp and is screwed into the top of the pump, between the two valye-covers. In the same way the valvecovers 0 and P are secured by means of the clamp T, nut- U, and stud S.

The cover to the stufiing-hox X isa separate cylindrical piece, Z, which fits inside of the stuffing-box X, and is crowded down against the packing inside by means of a cover-follower, Z, which is screwed onto the outside of 2 V 2es,ios

rod 0, between the guide G and water-box WV. This cross-head H may be connected by means of two links, or by one link whose lower end consists of two branches, so as to straddle the yoke Y, to a crank driven by any power as a stean1-engineor to a vertically-reciproeating rod, as in case of wind-power, or to a hand-brake fulcrumed at It. if the pump is to be operated by hand; but, however it may be driven, if the solid piston G is given a vertically-reciprocating motion, the operation of the pump will be as follows: Then the piston descends, water is drawn by suction into the top of cylinder Q, through the inlet I and valve M, filling that part of the cylinder above the piston. Then when the piston ascends the water above the piston will be discharged through the valve 0 and discharge J, the valve M closing meantime. During the ascent of the piston water is drawn by suction into the bottom of the cylinder Q, through the inlet I, valve N, and connecting-passage Q, filling that part of the cylinder below the piston. Then when the piston descends the water below the piston will be discharged through the connecting-passage Q, valve 1?, and dis charge J the valve N closing meantime. Thus water is continually taken in and discharged with both the descent and ascent of the piston. The valves 0 and I? prevent water returning into the cylinder after it is once discharged, and the valves 3 and N prevent water escaping from the cylinder by the way it comes in.

By simply loosening the nut U and turning the clamp T partly aroundand away from the elevated centers of the covers the covers M and Nmay be readily removed, thus enabling the valves M and N to be taken out and replaced without disturbing any other parts. In the same manner the valves 0 and I? may be removed and replaced by loosening the nut II on the stud S and turning the clamp T partly around and away from the elevated centers of the covers 0 and I. The centers of the covers M N O P are sufficiently elevated,so that when the ends of the clamps are turned away from the centers the covers may be raised high enough to clear the shoulders on their under sides, after which they may be moved sidewise and then upward,so as to clear the clamps. Furthermore, the elevated centers insure cen tral pressure on the covers, even though the clamps should not be turned exactly to their true position before tightening.

The water-box should not be confounded with the ordinary'oil-cup, which in this case would form a conical depression immediately around the piston-rod at the bottom of the water-box, as shown in Fig. 3. The waterbox WV is useful only when the stuffing-box leaks sufficiently to allow air to be drawn into the cylinder, so as to interfere with the suction of the pump; but such leakage is liable to occur unless prevented by a body of water sufficiently deep contained in the water-box WV.

I am aware that water-boxes used in connection with stuffing-boxes are not new in pumps of this kind; nor is the stuifing-box new constructed with stuffing-box cover Z and cover-follower Z, as I have shown and described; but the novelty which I have introduced consists in attaching the water-box W to or in making it a part of the cover-follower Z.

In some casesas, for example, where the pump is driven by steam-power onlythe brake-fulcrum is not required at all, and'might beinthe way. Inothercases-aswhereawindr mill drives the pump-the brake-fulcrum may be required occasionally, in case of calms, for pumping by hand. Furthermore, purchasers who originally intend to drive the pump by power only, and afterward find that a handbrake is worth the additional cost, can easily be furnished with the brakefulcrum, &c., all ready to bolt on.

Having thus fully described and explained I the nature of my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a double-action pump having valves arranged as shown and described, the clamp T, single stud S, and nut U, in combination with the valve-covers Mand N, provided with elevated centers, as and for the purpose herein shown and described.

2. In a double-action pump whose pistonrod works through a stuffing-box, X, provided with a cover, Z, and cover-follower Z, a water-box, W, attached to or forming a part of 100 the cover-follower Z, for the purpose of holding around the piston-rod a body of water of sufficient depth to prevent air being drawn in to the pump through the stuffing box, as specified.

THOMAS O. PERRY.

lVitnesses: v WVILLIAM S. DERBY, W M. H. BURN'HAM. 

